SEOUL, South Korea (AP) — As North Korea marches toward nuclear mastery, President Donald Trump slaps the country back on an American blacklist of state sponsors of terrorism. But is it anything more than bluster? After all, former President George W. Bush removed North Korea from that same list nearly a decade ago, also in an attempt to halt its march toward nuclear mastery. Aside from a pretty good illustration of just how hopeless the decades-long effort to get North Korea to abandon its nuclear ambitions can seem, the contrasting approaches also show that the list has always been more about symbolism than substance. The top U.S.